Cartridge shell



Jan. 22 1924.

S. A. NORTH CARTRIDGE SHELL Filed March 2. 1 921 WITNESS INVENTOR.

SAMUEL A. NORTH. BY a A TORNEY mm W KW.

Patented Jan. 22, 1924..

SAMUEL A BTQRTH, OE BRIDGEPOBT, CONNECTICUT.

CARTRIDGE SHELL.

Application filed March 2, 1921. Serial No. 449,020.

To all whom it may concern Be it known that I, SAMUEL A. Non'rn, a citizen of the United States, residing at Bridgeport in the county of Fairfield and State of 'onnecticut, have invented certain new and useful Improvements in Cartridge Shells,'of which the following is a specification.

This invention relates to cartridge shells and especially to that class which is commonly termed paper shot shells and has for its primary ob ect an improved construction whereby the shell body is efiectually interlocked with the base and base wad to prevent the separation of these two parts during the discharge of the shell.

A further ObJQCl) is to provide a gas-tight joint between the various components of the shell so as to prevent the leakage of gases from the shell into the breech chamber or between the base and the base wad as frequently occurs with shells as constructed heretofore.

Another object is to provide a shell of this character the powder chamber of which is formed with a cushioned or padded lining to take up the initial explosion pressure, and to shield the shell proper from the heat of the explosion gases.

A further object is the provision of such a shell having a powder chamber of unusual thickness and strength.

Other objects will up ear in the specification which follows; re erence being had to the accompanying sheet of drawings which illustrate a preferred embodiment of my invention, in which:

Fig. 1 is a longitudinal section of the various parts for a shell embodyinlg this invention and illustrates the relative ositioning of the parts in the process 0 assembling.

4 Fig. 2 is a view, partially in section, of a finished shell.

In the drawing, 3 denotes the base, the lower portion of which has a rim 4 forming a circular internal annular recess 5. The base cap 3 has a central aperture'7 through which projects the battery cup 8 containing the primer 9 in the usual manner. Any other usual base would do as well.

The shell body 6' is preferably formed from the usual paper tube by having its lower portion turned back in-by' a spinning operatlon into the form seen in Fig. 1 forming the inturned shell 6. This operation reduces the density of the body material and causes it to fiufl up so that inturned shell 6 which lines the powder chamber forms an elastic lining for the powder chamber and acts as a cushion for the gases and absorbs any shock that would otherwise have been transmitted directly to the shell and l 'n chamber. This greatly minimizes the anger of the disruption of the shell or gun and permits of the use of larger and more rapid powder loads.

A further advantage of such a lining, whether elastic or not, is that it shields the material of the shell body proper from the heat of the gases of explosion. The exploslon temperature is so high that the shell material is fr uently scorched and weakened so that isrup'tion of the cartrid e shell may occur. The present invention 0 viously overcomes this dificulty.

In assemblin the base wad 10, which may be of any suitagle construction and material, is inserted into the shell body and the body and wad together are inserted into the base 3. While the base and shell body are confined in a die a punch is brou ht upon the base wed in the usual way. llhe wad is compressed longitudinally and expanded transversely whereby that part of the inturned shell 6 which lies adjacent the wad is compremed to substantiall as shown. However, there is some excess material atthe bend in the shell and this forms an internal flange 11 interlocking with the base wad 10 and an external .flan e 12 interlocking with the internal recess 5 1n the base, thus forming an exceptionally stron connection between the shell body and t e base and base wad.

The shell is loaded in the usual way as by owder 13, wads 14, shot 15' and. a top wad 6 held in place by the crimp 17.

Havin described my resent invention, what I c aim as new and desire to secure by Letters Patent is Y 1. In a cartridge, a tubular shell body, a base, a base. wad, and an elastic lining in said shell body extending above said base wad said lining being integral with said shell body.

2. In a cartridge, a tubular shell body, a base, a base wad and an elastic lining in said shell body extending above said base wad, said lining being body and comprising an inturned extension thereof.

that part of the v y its original thickness integral with said shell.

body by the 3. In a cartridge, a tubular shell body having an elastic inte ral inturned portion, a base receiving said s ell and formed with an internal annular recess and a base wad expanded into said shell body whereby a portion of said shell body is received in said recess and the body is securely connected with the base.

4. In a cartridge, a tubular shell body having an elastic integral inturned portion, a base receiving said shell and formed with an internal annular recess, integral inmrnal and external flanges formed on said shell doubling over of the material of the inturned portion, said external flange lying in said recess, and a base wad in said shell body formed with an external annular recess receiving said internal flange.

5. In a cartridge, a tubular shell body having an integral inturned portion, a base receiving said shell and formed with an internal annular recess, integral internal and external flanges formed on said shell body by the doubling over of the material of the inturned portion, said external flange lyin in said recess, and a base wad in said shell body formed with an external annular recess receiving said internal flange, said inturned portion bein elastic and extending above said'base we and formin'g an elastic lining for said shell body.

6. In a cartridge, a tubular shell body having an integra in'turned portion, a base receiving said shell, said inturned portion being elastic and forming an elastic lining for said shell body.

7. In a cartridge, a tubular shell body, a base wad, and an elastic protective lining in said shell body extending above said base Wad, said lining being integral with said shell body.

8. In a cartridge, a tubular shell body, a

base wad, and an elastic protective linin 1n said shell body extending above said ase wad, said lininlg being integral with said shell bod and comprising an inturned extension t ereof.

9. In a cartridge, a tubular shell body, a base, a base wad and an elastic protective lining in. said shell body extending above said base wad, said lining being integral with said shell body and comprising an inturned extension thereof.

In witness whereof I have signed my name hereto this 23d day of February 1921.

SAMUEL A. NORTH. 

